On Thu, Jul 30, 2020 at 05:20:46PM +0200, Christoph Hellwig wrote: > Fortunately I think the fix is pretty easy - remove the special pipe > zero copy optimization from copy_page_to_iter, and just have the > callers actually want it because they have pagecache or similar > refcountable pages use it explicitly for the ITER_PIPE case. That gives > us a safe default with an opt-in into the optimized variant. I'm > currently auditing all the users of for how it is used and that looks > pretty promising. Huh? What does that have to do with anything?
